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| Mirrors > Home > MPE Home > Th. List > xmulpnf2 | Structured version Visualization version GIF version | ||
| Description: Multiplication by plus infinity on the left. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xmulpnf2 | ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfxr 11199 | . . . 4 ⊢ +∞ ∈ ℝ* | |
| 2 | xmulcom 13218 | . . . 4 ⊢ ((+∞ ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) | |
| 3 | 1, 2 | mpan 691 | . . 3 ⊢ (𝐴 ∈ ℝ* → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) |
| 4 | 3 | adantr 480 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = (𝐴 ·e +∞)) |
| 5 | xmulpnf1 13226 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (𝐴 ·e +∞) = +∞) | |
| 6 | 4, 5 | eqtrd 2771 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 0 < 𝐴) → (+∞ ·e 𝐴) = +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5085 (class class class)co 7367 0cc0 11038 +∞cpnf 11176 ℝ*cxr 11178 < clt 11179 ·e cxmu 13062 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulcom 11102 ax-i2m1 11106 ax-rnegex 11109 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-xmul 13065 |
| This theorem is referenced by: xmulrid 13231 xmulgt0 13235 xmulasslem3 13238 xlemul1a 13240 xadddi2 13249 nmoix 24694 rexmul2 32827 nn0xmulclb 32844 hashxpe 32880 fldextrspundgdvdslem 33824 esumpinfsum 34221 |
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